Passive, Active & Bulk transport!?!?!!!!!! Flashcards
What is Homeostasis?
Cells need to have a steady environment to carry out their functions.
- Cell membrane allows… hemostasis to be maintain.
—> it is assisted by laws of diffusion.
What is Passive Transport?
- The movement of substances across the membrane w out the need 4 ENGERY!!!!
What is Diffusion?
The movement of molecules from a high concertation area to a low.
What is Osmosis?
The diffusion of the water across a semi-permeable membrane separating the solutions.
What is Isotonic?
Water inside cell that = the water outside of the cell.
What is Hypotonic? And what is it called?
Water outside the cell is greater than the inside of the cell which may cause the cell to burst… aka lysis.
What is Hypertonic? And what is it called?
Water inside the cell is greater than out which causes the cell to shrink aka plasmolysis.
Plant cell membrane pulls away from the cell wall.
What is Faciliated Diffusion?
- Movement in and out of cell means…
- Carrier proteins OR channel embedded in cell membrane.
What is Carrier Protein?
Membrane accepts Non charged molecules w a specific shape.
What is a channel Protein?
Accepts charged particles to pass though the cell membrane.
What is active transport?
The movement of substances against the concentration gradient —> energy is required.
What is the Sodium & Potassium involvement with active transport?
NA+ and K+ ions moved against the concentration gradient and with the help of specific membrane protein an using energy (ATP).
—> 3 NA+ move out and 2 K+ move in.
—-> Establishes charged differential.
—> Helps to force diffusion of sodium back in.
What is Bulk Transport?
Requires the formation of vesicles to swallow or expel material. (Requires Energy)
What are the types of Bulk transport?
- Pinocytosis
- Phagocytosis
- Receptor Mediated
What is Pinocytosis?
Means “Cell eating”
- The intake of small droplets of E.C.F in dissolved particles.
